Malicious PDF — malware analysis report

Static analysis result for SHA-256 177d3216e06956ea…

MALICIOUS

PDF

87.2 KB Created: 2021-09-17 08:51:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 839e08999b787a92e70756705cd15462 SHA-1: 021d29fe2f6e2bfd388ec24e7a0a4a3e327edb5d SHA-256: 177d3216e06956ea7a1ab78fafd5ccb04b00532bd14b6642a720a5bfd4ca99d0
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users. The presence of a 'password-protected archive handoff' heuristic indicates the document may be instructing users to open an encrypted file, a common tactic to bypass security filters. While no scripts were directly extracted, the overall structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://philabc.ru/uplcv?utm_term=how+to+view+rar+files+in+android PDF link annotation
    • http://combatkuntao.com/ckeditor/ckfinder/userfiles/files/niperebepujojapagogegaj.pdfIn PDF document text
    • http://studiorumeo.it/userfiles/files/31748090217.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134c3c0dd02c---negapawofobubawuvi.pdfIn PDF document text
    • https://okazionche.com/files/54153985720.pdfIn PDF document text
    • http://logenamerica.com/userfiles/file/pojupozawomekejotogago.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/16133913e99f95---38309206471.pdfIn PDF document text
    • https://www.dooleysnaturalgas.com/ckfinder/userfiles/files/wemizesafozelu.pdfIn PDF document text
    • https://nutrishop.in/ci/userfiles/files/71427168731.pdfIn PDF document text
    • https://dascalita.ro/app/webroot/files/userfiles/files/titudejija.pdfIn PDF document text
    • http://peknanevesta.sk/media/file/busijuxam.pdfIn PDF document text
    • http://colorfusion.us/admin/images/file/keribifonin.pdfIn PDF document text
    • http://pekingtogo.com/uploads/files/23626730329.pdfIn PDF document text
    • https://plewmal-d.com/Uploads/files/fajagujobonunenewititu.pdfIn PDF document text
    • http://qianxi.cn/filespath/files/20210901021107.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/3b50f4986a4f83444b849ffee2a8ecc5/jonuxafowixoladoz.pdfIn PDF document text
    • https://webmakler.org/userfiles/file/40877562675.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1612ea5c329324---59343847690.pdfIn PDF document text
    • https://highfieldhousehotel.net/nbloom/fckuploads/file/16973225572.pdfIn PDF document text
    • http://lnv-cnc.com/userfiles/file/sutonovegade.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/161314256412b7---kogujerawomevite.pdfIn PDF document text
    • http://tuanlongland.com/upload/files/kusomulijabaxowomefekut.pdfIn PDF document text
    • https://edarky.net/data/file/detigelonidenuvalo.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/5c0c6a96492253c7b287b3565b675215/labefona.pdfIn PDF document text
    • http://sanfrancescovet.com/userfiles/files/25205133884.pdfIn PDF document text
    • http://www.tamtrebinhminh.com/public/files/jezatekaloxoluxefagubu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF060 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010872.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10872 18368 bytes
SHA-256: 96927bb6197d897a2ff0d024b9c19ae7648578d2a482802997194edd45e964f9
font_02_sfnt_off0001372b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1372B 10492 bytes
SHA-256: 459ee04f7f630a573c4d9375377b68691faa525469bdcd28049baf16fb1344b7

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